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第1题

If one enjoys life, one is sure to prefer(). A. red to yellow B. blue to orange C. red to grey D. blue to yellow
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第2题

The author indicates that()is threatening American political power. A. other countries B. the declining U.S. industria
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第3题

2 将梁上集中力偶左右平移时，梁的剪力图不变化，弯矩图变化。 (本题2.0分) A、 正确 B、 错误
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第4题

There are 20 blanks in the following passage. For each blank there are four choices marked A), B), C) and D). You shoul
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